If you notice that the saw binds pull the hole saw away from the siding tilt the hole saw in a different direction and restart drilling the hole.
Cut hole through wall with aluminum siding.
Hole saws cut bigger holes for large holes a hole saw gets the job done cleanly and quickly.
6 pull the wall cap and duct out of the wall.
Here s one that claims to come with a circle cutting attachment for 15.
Position the pattern on the sheet metal where the hole needs to go and draw a line around it using a permanent marker.
Sometimes called a spiral saw or rotary cutting tool.
Create a paper pattern of the size and shape of hole you wish to cut.
Apply a thick bead of silicone adhesive.
Measure from the edges of the sheet metal to the point at which you wish to place the hole.
Hold your drill firmly with two hands photo 4 and brace it against your leg if possible.
I have an ancient dewalt 660 with a circle cutting attachment.
Tons of companies make similar tools.
Don t lock the trigger on.
Open the power shears and slide the bottom blade under the metal siding.
If the drill tilts to one side it may bind and jerk.
Assuming you ve got access from below to the joist space you can use tin snips also called aviation snips to cut the siding and a hole saw or reciprocating saw sabre saw or sawzall to cut.
When using a hole saw to drill the hole in aluminum siding keep the saw slightly tilted to one side to reduce the chances that the hole saw will bind while cutting the hole.
It s basically a smallish router and used all the time for cutting holes in drywall shower walls etc.
5 cut along one of the vertical lines with the power sheers.
A bimetal hole saw is easiest to use because it ll chew through an occasional nail without dulling and cut cleanly through vinyl or aluminum siding.
Line the blade up with the drawn line.